Pyrotechnic compound.



1 5 UNITED STATES. PATENT; OFF

ARTHUR EIOHENGRUN, OF ELBERFE'LD, GERMANY, ASSIGNOR To FARB N- FABRIKEN or ELBERFELD 0o; on NEW YOR N; Y., A CORPORATION OFVNEW YoRK.

PYROTEC'HNIC COM ouse,

SPECIFICATION forming- "part of Letters Patent No. 710,047, dated September so, 1902. Application filed February 3, 1902. Serial No. 92.458-. (No specimens.)

T0 on whom it may concern/.- v

Be it known that I, ARTHUR EIoHENcRt N,

I doctor of philosophy, chemist, residing at Elable for the manufacture of pyrotechnic compounds to be used as fireworks, flash-lights forphotographicpurposes,signal-lights'gBengal fires, &c.

Hitherto pyrotechnic compounds of the class to which those discovered by me belong j were madeby addingto metallic powders which have a'strong aflinity for oxygen, and.

are therefore easily combustible and the coinbnstion of which produces a light of great in tensityrich in actinic power, such as magnesium or aluminium, substances which easily give olf oxygen, such as chlorate of potash, nitrate of potash, persulfate of potash, perchlorate of pot-ash, &c. Mixtures of this kind,

however, possess the disadvantages of being explosive and of giving ofi large quantities of smoke and dust, the generated gases in some cases being even of a noxious character.

I have now found a process of making pyrotechnic compounds which do not possess the above bad qualities and the combustion of whichproduces at the same-time great lu'minosity. v

The process for manufacturing these new products consists in mixing very fin ely ground metallic magnesium, aluminium, 85c. with the peroxids of calcium, manganese, or magnesium.

In carrying out my process practically'lcan proceed as follows: One part of finely-ground magnesium is intimately mixed with one part of finely-ground manganese peroxid.

In order to produce colored-light eifects for signaling or for'Bengal fires, &c., the above new compounds may be mixed "with suby stances generally used in pyrotechnics for colored lights, such as nitrate of strontium, 8 the combustionof which should be slow, the substances usually employed for this purpose,

If it is desired tow-produce a compound such as gypsum; may'be added to the above I newcompoun s. 1

- The new pyrotechnic compounds may also i be mixed with some binding material, such as starch, glue, dextrin, gum-arabic,-she1lac,

collodion, &c. With such mixtures sheets of paper or sheets of other substances,sticks or, stalks of wood or of other substances canbe coated. l

When my'new. pyrotechnic compounds are in the form of a dry powder, they may be ignited by strewing them on the ground or on a suitable open receptacle, or they may be pound being a mixture of magnesium with manganese peroxid, substantially as .de-

scribed. I

In testimony whereof I have signed my name in the presenceof two A THUR EIOHENGRUN.

.Witnesses:

O'r'ro KoNIe, T. A. RITTERSHAUS.

subscribing wit-- 

